Adding Keystone dockerfile Patchset 2: - Updated Keystone to Openstack Queens version. - If Keystone fails container dies. Patchset 3: - Removed port 35357 (no longer used). - Added safeguards. - Removed warnings regarding to bash. Change-Id: I50cae8b34f717ff63cbbc1837375a0245d8fccc5 Signed-off-by: Eduardo Sousa <esousa@whitestack.com>